Practice Cells In Series And Parallel (2.9) - Current Electricity

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9 questions

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6 sample questions

Question 1.
What is the total emf of two 1.5V batteries connected in series?
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Add the voltages together.
Question 2.
What happens to internal resistance when cells are connected in series?
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Think about how many resistances there are.
3Question 3.
What happens to the effective emf when cells are connected in series?
- It stays the same
- It adds up
- It decreases
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Think about summing the voltages of each cell.
4Question 4.
True or False: Internal resistance decreases when cells are connected in parallel.
- True
- False
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Consider how cells share the current flow.
Question 5.
You have two batteries in series, one with 6V and 2Ω resistance and another with 3V and 1Ω. What is the total voltage and resistance if used in a circuit?
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Add voltages directly for total voltage.
Question 6.
Three identical batteries with an emf of 12V and internal resistance of 4Ω each are connected in parallel. Calculate the effective emf and total internal resistance.
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Use the formula for parallel to find the total resistance.

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